A302229 Number of 6Xn 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 361, 2666, 21777, 292781, 3420704, 42508145, 524715109, 6339899565, 78476978749, 958583337489, 11758190038504, 144419322238672, 1768994677452799, 21718288663168847, 266355912494488737

Offset

1,2

Comments

Row 6 of A302224.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

Some solutions for n=5
..0..0..1..1..1. .0..0..0..1..1. .0..0..1..1..1. .0..0..0..1..1
..1..0..0..0..1. .1..0..0..1..0. .0..0..1..0..0. .0..1..1..0..1
..1..1..0..1..1. .1..1..1..0..1. .0..1..1..1..0. .1..1..1..0..1
..0..1..1..0..0. .0..0..0..0..1. .1..1..0..0..0. .0..0..0..1..1
..0..0..1..0..1. .0..1..1..1..0. .0..1..1..1..1. .1..1..0..1..0
..1..1..0..1..1. .1..1..0..0..1. .0..0..1..0..0. .1..1..0..0..1

Crossrefs

Cf. A302224.

Sequence in context: A233552 A176899 A361704 * A302672 A302476 A231975

Adjacent sequences: A302226 A302227 A302228 * A302230 A302231 A302232

Keyword

nonn

Author

R. H. Hardin, Apr 03 2018

Status

approved